<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片示图区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col >
          <el-button type="primary" @click="addDialogVisible = true">
            添加角色
          </el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
            <!-- eslint-disable-next-line -->
            <template slot-scope="scope">
                
             <el-row :class='["bdbottom",i1===0?"bdtop":"","vcenter"]' v-for="(item1,i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                    <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二、三级权限 -->
                <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id" >
                    <!--  -->
                    <el-col :span="6">
                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                        </el-col>
                    <el-col :span="18">
                      <!-- eslint-disable-next-line -->
                         <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                         {{item3.authName}}
                         </el-tag>
                    </el-col>
                </el-row>
                </el-col>
             </el-row>
            </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="#" type="index"> </el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="350px">
          <!-- eslint-disable-next-line -->
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
            >
              编辑
            </el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
            >
              删除
            </el-button>
            <el-button type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">
              分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主题区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false"> 取 消 </el-button>
        <el-button type="primary" @click="addRole"> 确 定 </el-button>
      </span>
    </el-dialog>
    <!-- 修改角色的对话框 -->
    <el-dialog
      @close="editDialogClosed"
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false"> 取 消 </el-button>
        <el-button type="primary" @click="editUserInfo"> 确 定 </el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
      <el-dialog
      @close="setRightDialogClosed"
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
    >
      <!-- 树形控件 -->
      <el-tree ref="treeRef" :default-checked-keys="defKeys" default-expand-all node-key="id" show-checkbox :data="rightsList" :props="treeProps">
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false"> 取 消 </el-button>
        <el-button type="primary" @click="allotRights"> 确 定 </el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return { 
      //所有角色列表数据
      roleList: [],
      //所有权限的数据
      rightsLisy:[],
      //默认选中的节点Id值
      defKeys:[
       
      ],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible:false,
      //添加角色表单数据
      addForm: {
        roleName: "",
        roleDesc: "",
      },
      //查询到的信息对象
      editForm: {},
      //控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      //控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      //添加表单验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      //修改表单的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      //树形控件的属性绑定对象
      treeProps:{
        label:'authName',
        children:'children',
      },
      //当前即将分配权限的角色Id
      roleId:'',
    }
  },
  created() {
    this.getRoleList();
  },
  methods: {
    //  获取所有角色的列表
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.roleList = res.data;
      console.log(this.roleList);
    },
    //监听添加角色对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    //点击按钮 添加角色
    addRole() {
      //valid为校验结果 true or false
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        //可以发起添加角色的网络请求
        const { data: res } = await this.$http.post("roles", this.addForm);
        if (res.meta.status !== 201) {
          return this.$message.error("添加角色失败！");
        }
        this.$message.success("添加角色成功！");
        //隐藏添加角色的对话框
        this.addDialogVisible = false;
        //重新获取角色列表
        this.getRoleList();
      });
    },
    //根据Id删除对应的角色信息
    async removeRoleById(id) {
      //弹框询问用户是否删除数据
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => {
        return err;
      });
      //如果用户确认删除，则返回值为字符串confirm
      //如果用户取消删除。则返回值为字符串cancel
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("删除角色失败");
      }
      this.$message.success("删除角色成功");
      this.getRoleList();
    },
    //展示编辑角色的对话框
    async showEditDialog(id) {
      // console.log(id)
      const { data: res } = await this.$http.get("roles/" + id);

      if (res.meta.status !== 200) {
        return this.$message.error("查询角色信息失败！");
      }

      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //监听修改角色对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    //修改角色信息并提交
    editUserInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        console.log(valid);
        if (!valid) return this.$message.error("校验不通过");

        //发起修改角色信息的数据请求
        const { data: res } = await this.$http.put(
          "roles/" + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc,
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("更新角色失败");
        }
        //关闭对话框
        this.editDialogVisible = false;
        //刷新数据列表
        this.getRoleList();
        //提示修改成功
        this.$message.success("修改成功");
      });
    },
    //根据ID删除对应的权限
    async removeRightById(role,rightId){
      //弹框提示是否要删除
         const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)

        if(confirmResult!=='confirm'){
          return this.$message.info('取消了删除')
        }
      let id = role.id
      const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status!==200)return this.$message.error('删除权限失败');
      this.$message.success('删除权限成功')
       // this.getRoleList();
      role.children=res.data
    },
    //展示分配权限对话框
    async showSetRightDialog(role){
      this.roleId=role.id
      //获取所有权限数据
      const {data:res} = await this.$http.get('rights/tree')
      if(res.meta.status!==200)return this.$message.error('获取权限数据失败');
      //把获取到的权限数据保存到data中
      this.rightsList = res.data
      //递归获取三级节点的Id
      this.getLeafKeys(role,this.defKeys)
      
      this.setRightDialogVisible=true;

    },
    //通过递归的形式，获取角色下所有三级权限的id
    //并保存到defKeys数组中
    getLeafKeys(node,arr){
      if(!node.children){
        //如果当前node节点不包含children属性，则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach(item=>{
        this.getLeafKeys(item,arr)
      })
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defKeys=[]
    },
    //为角色分配权限
    async allotRights(){
      const keys = [ 
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
      const idStr =keys.join(',')
      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,
      {rids:idStr})

      if(res.meta.status!=200){
        return this.$message.error('分配权限失败')
      }
      console.log(res.meta.status)
      this.$message.success('分配权限成功')
      this.getRoleList()
      this.setRightDialogVisible=false
    }
  },
};
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top:1px solid #eee
}
.bdbottom{
    border-bottom:1px solid #eee
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>